JPS641631B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic door opening/closing control method and apparatus for controlling a drive device for opening and closing an automatic door.

As is well known, automatic doors, in which a drive device such as an electric motor is connected to the door via a fluid reducer, are driven by the drive device at a constant speed even when the door is braked or stopped. can continue.
Therefore, it is not necessary to control the drive device of such an automatic door by detecting the door position using a limit switch or the like, and every time an open or close command signal is sent from a detection device that detects passing objects. It is only necessary to drive in the opening direction or the closing direction for a predetermined time sufficient for opening and closing each time. In this case, the door is adjusted so that the closing speed is slower than the opening speed for the safety of pedestrians, etc., so this predetermined driving time is set so that it is longer in the closing direction. Ru.

As described above, the device described in Japanese Utility Model Publication No. 48-4282 has been put into practical use as an automatic door opening/closing control device that can set the drive time differently depending on the opening/closing direction of the door. This conventional opening/closing control device is used as a timer to measure drive time.
Using a transistor timer connected to the CR integration circuit, the driving time is made to vary by switching to a capacitor with a different capacity depending on the opening/closing direction of the door. However, in order to adjust the driving time in such conventional opening/closing control devices when they open and close together while keeping them different depending on the opening and closing directions, this can be easily done by changing the resistance value of the CR integral circuit. , the disadvantage is that the difference in drive time in the opening and closing directions changes geometrically as the drive time is adjusted. Furthermore, the method of changing the resistance value of the CR integration circuit and the capacitance of each capacitor in conjunction with each other has the disadvantage that the variable device for these resistors and capacitors becomes too complicated.

This invention was made in view of the above circumstances, and the driving time in each opening/closing direction is determined by the sum of the time measured by one of the two timers and the time measured by another timer. By making it possible to change the measurement time of this one timer that is commonly used in both the opening and closing directions, the difference in drive time in the opening and closing directions is always constant. An object of the present invention is to provide a method and device for controlling the opening and closing of an automatic door, by which each drive time can be easily and freely adjusted.

Embodiments of the invention will be described based on the drawings.

As shown in FIG. 1, the automatic door opening/closing control device of the present invention has a gate connected between a detection signal input M and two types of opening/closing drive signal outputs X and Y via a logic circuit. It is composed of a first timer 1, a second timer 2, a third timer 3, a signal selection circuit 4, and a direction selection circuit 5. Detection signal input M is a binary detection signal from a detection device such as an automatic door matsu switch that outputs an open command when a passing body is detected before or after the door, and a close command when other states are detected. Enter. However, for automatic doors, when controlling the timing until the door starts opening and closing, such as setting the door open holding time to delay the timing when the door starts closing for the safety of pedestrians, it is necessary to The timing of command switching is controlled before sending it to the detection signal input M. Open and close drive signal outputs X and Y are connected to a door drive device via a relay circuit or the like. With this relay circuit, etc., the drive device is driven only while the drive signals output from the open/close sinking signal outputs X and Y are drive commands, and when the drive command of the drive signal is open. Depending on which of the drive signal output X and the close drive signal output Y is output, the rotation direction of the electric motor is changed, and the door is respectively driven in either the opening direction or the closing direction. Hereinafter, the open command of the detection signal and the drive command of the drive signal are assumed to be H (high voltage level),
Explain using positive logic. However, the same effect can be achieved even when the open command of the detection signal is set to L (low voltage level) or when negative logic is used, as long as the logic circuit is converted accordingly.

FIG. 1 shows a first timer 1, a second timer 2, and a third timer 3, which are time-limited instant return type timers and which perform a time-limited operation when the input switches to H. ) type timer is used. The first timer 1 and the second timer 2 are constructed by connecting CR circuits C ₁ , R ₂ and C ₂ , R ₃ , R ₄ and diodes D ₁ and D ₂ as shown in FIG. CR than the time constants of C ₁ , R ₁ , and R ₂
The time constants of circuits C ₂ , R ₃ , and R ₄ are set to be longer. In this way, the first timer 1 and the second timer
The timer 2 is set so that the time measured by the time constant of the CR circuit is longer than that of the second timer 2. The third timer 3 includes CR circuits C ₃ , R ₅ , R ₆ ,
By connecting R ₇ , power supply Vcc, and diode D ₃ as shown in Figure 1, and adjusting variable resistor R ₆ , the time constants of CR circuits C ₃ , R ₅ , R ₆ , and R ₇ can be freely adjusted. I'm trying to make it changeable. In this way, the third timer 3 can freely adjust the time period determined by the time constant of the CR circuit.

The first timer 1 and the second timer 2 are connected to the detection signal input M in parallel. The first timer 1 is
The second timer 2 is connected to directly input the detection signal, and the second timer 2 is connected to input the detection signal via the NOT circuit 6. In this way, the first timer 1 is connected to the detection signal input M so as to start timing at the same time the detection signal switches to the open command (H), and the second timer 2 is connected to the detection signal input M when the detection signal switches to the close command (L). ) is connected to the detection signal input M so as to start timing at the same time as switching to the current state. And during this connection
Whether the NOT circuit is used or not depends on the type of timer that starts timing by inputting signals to the first timer 1 and the second timer 2. Therefore, this first timer 1 and the second timer
Timer 2 can be used as an off-delay timer or a one-shot timer, as shown later in Figures 3 and 5, by connecting it through an appropriate NOT circuit.
Any type of timer can be used.
By the way, when controlling the timing of opening and closing the door, as described above, the detection signal is controlled in advance and then sent to the detection signal input M, but when setting the door open holding time, It is also possible to connect only the second timer 2 to the detection signal input M via a control circuit (delay circuit, etc.). However, no matter where such a control circuit is connected, the same effect can be obtained by converting the circuit, so in such a case, the second timer 2 is connected using the output signal of the control circuit as a detection signal. Also,
The same applies when only the first timer 1 is connected via this control circuit. 1st timer 1 and 2nd
The output of the timer 2 is connected through a signal selection circuit 4. The signal selection circuit 4 is constituted by an OR circuit, and the outputs of the first timer 1 and the second timer 2 are connected by inputting them to the OR circuit, respectively. In this way, the signal selection circuit 4
is a circuit that extracts a signal indicating only the time period that the first timer 1 and the second timer 2 are measuring, so please use it as appropriate.
Consists of AND circuits, OR circuits, etc. Which circuit elements constitute the signal selection circuit 4?
The determination is made depending on the type of signals that the first timer 1 and the second timer 2 output. In the case of an off-delay timer shown later in FIG. 3, it is easier to configure it with an AND circuit. Also, if the directions of the signals output by the first timer 1 and the second timer 2 are different, one of the outputs is
Must be input via a NOT circuit. The AND circuit that constitutes the signal selection circuit 4 and
Depending on the circuit configuration of the first timer 1, second timer 2, etc., the OR circuit may be wired without using circuit elements.
It can also be configured by an OR (or wired AND) circuit. The third timer 3 is directly connected in series to the output of the signal selection circuit 4. in this way,
The third timer 3 is the first timer 1 or the second timer 2.
The signal selection circuit 4 is connected to the output of the signal selection circuit 4 so that it starts timing at the same time when any one of them finishes timing. The type of the third timer 3 and the signal selection circuit 4
If required by the output signal of , it is connected via an appropriate NOT circuit as shown later in FIG.
Therefore, the third timer 3 also uses the first timer 1 and the second timer 3.
Like timer 2, any type of timer can be used. The direction selection circuit 5 is composed of a NOT circuit 7 and two AND circuits 8 and 9.
It is connected to the output stage of this control circuit. NOT
The circuit 7 inputs the output of the third timer 3 and receives the output from the third timer 3.
The output of NOT circuit 7 is branched in two directions to create two
They are connected to be input to AND circuits 8 and 9, respectively. One AND circuit 8 is NOT circuit 7
It is connected so that the output of the first timer 1 is input thereto, and the input of the first timer 1 is branched and inputted thereto. Also,
The other AND circuit 9 is connected so as to input the output of the NOT circuit 7 and also branch the input of the second timer 2. The open drive signal output X is
It is connected to the output of one AND circuit 8, and the close drive signal output Y is connected to the output of the other AND circuit 9. In this way, the direction selection circuit 5
When the detection signal is an open command (H), open drive signal output
Also, when the detection signal is a close command (L), a drive signal that becomes a drive command (H) is distributed and output from the close drive signal output Y only while each timer 1, 2, and 3 is counting time. It is connected to the output stage of this control device. As a result, from the open drive signal output
The drive command (H) is issued only while the timer 1 and the third timer 3 are continuously counting time, and the close drive signal output Y is issued while the second timer 2 and the third timer 3 are continuously counting the time. A drive signal that becomes a drive command (H) is output respectively. In order to connect the direction selection circuit 5 to the output stage in this manner, it is necessary to input information on the detection signal and information on the signal indicating that each timer 1, 2, and 3 is clocking. In the embodiment, since the two AND circuits 8 and 9 are used to perform the distribution, the first timer 1 is used as the detection signal information.
and the input signal of the second timer 2 are input, but the detection signal may be input directly or indirectly by another method and distributed by a circuit element or the like that switches the output direction. In addition, in the embodiment, since a time-limited operation instantaneous recovery timer is used as the third timer 3, the output signal of the third timer 3 also includes the time measured by the first timer 1 and the second timer 2. . Therefore, the direction selection circuit 5
By inputting only the output signal of the third timer 3, it was possible to input signal information indicating that each timer 1, 2, and 3 was measuring time. but,
When a one-shot timer is used as the third timer 3, the direction selection circuit 5
along with the output signal of the first timer 1 and the second timer 2.
In order to obtain information on the signal indicating that the signal selection circuit 4 is measuring time, it is necessary to connect the output signal of the signal selection circuit 4 to be inputted via an OR circuit or the like.

Although the logic circuit has been explained here in a form organized by DeMorgan's theorem, etc., the actual control device may use a logic circuit modified according to the theorem. Furthermore, the configuration of each timer 1, 2, and 3 may be a timer using a transistor or a relay in addition to the CR circuit shown in FIG. 1.

The operation of the automatic door opening/closing control device of the present invention configured as described above will be explained based on the descriptions in FIGS. 1 and 2. Figure 2 shows changes in voltage levels at the input and output of each circuit element shown in Figure 1 with time t.
This is a time chart showing the progress of the period.
First, at time _t1 , when the detection signal from the detection signal input M switches to H, which is an open command, the input A of the first timer 1 becomes H, and the capacitor _C1 is connected to the resistor _R1 ,
Start charging through R ₂ and start timing. NOT
The second timer 2 connected via the circuit 6 has an input B
becomes L, and the capacitor C ₂ that was already charging
is discharged through resistor R ₄ and diode D ₂ .
At this time, since the discharge occurs instantaneously without passing through the resistor _R3 , the output D of the second timer 2 is also switched to L at the same time. The output C of the first timer 1 maintains L even after t ₁ , but switches to H when the first timer 1 finishes counting after the counting time T ₁ (at t ₂ ). Next, at time _t4 , when the detection signal switches to L for the close command, the input A of the first timer 1 becomes L, and the capacitor _C1 is connected to the resistor _R2 and the diode D1 _.
, and the output C switches to L at the same time. When the input B becomes H, the second timer 2
Capacitor C ₂ begins charging through resistors R ₃ and R ₄ and begins timing. Then, the output D of the second timer 2 switches to H when the second timer 2 finishes counting time after the counting time _T2 (at time _t5 ).
When the outputs C and D of the first timer 1 and the second timer 2 are input to the OR circuit of the signal selection circuit 4, the output E of the signal selection circuit 4 is the output of the first timer 1 and the second timer 2. (between _t1 and _t2 and _t4 and _t5 )
The signal that becomes L is extracted and output. The third timer 3 is configured such that when the output E of the signal selection circuit 4 switches to L (at times _t1 and _t4 ), the capacitor _C3 that has already been charged is instantly charged through the resistor _R7 and the diode _D3 . It discharges, and the output F also switches to L at the same time. Furthermore, when the output E of the signal selection circuit 4 switches to H (at time t ₂ and t ₅ ), the capacitor C ₃ is connected to the power supply Vcc.
The current starts charging through resistors R ₅ , R ₇ and variable resistor R ₆ and starts timing. And the third
The output F of timer 3 is the time measured by the third timer 3.
When timing ends after T ₃ (at t ₃ and t ₆ ),
Switch to H. As a result, the third timer 3 starts timing at the same time as the first timer 1 or the second timer 2 finishes timing, and the output F is the result of the first timer 1 and the third timer 3 continuously counting time. While (t _1
-t3 ) and while the second timer 2 and third timer 3 are continuously counting time ( _t4 to _t6 ), a signal that becomes L is output. The NOT circuit 7 of the direction selection circuit 5 negates the signal of the output F of the third timer 3 and obtains the output G. When one AND circuit 8 inputs the output G of the NOT circuit 7 and the input A of the first timer 1, the open drive signal output
While the third timer 3 and the third timer 3 are continuously counting time (t ₁ ~
A drive signal that becomes H (drive command) only during time _t3 ) is output. Also, the output G of this NOT circuit 7 and the second
When the other AND circuit inputs the input B of timer 2, the close drive signal output Y is generated while the second timer 2 and the third timer 3 are continuously measuring time (between t ₄ and t ₆ ).
outputs a drive signal that becomes H (drive command).
As a result, the direction selection circuit 5 selects each timer 1, 2,
The signal of the part indicating only while timer 3 is counting (the part where the output F of the third timer 3 becomes L) is used as a drive command (becomes H by the NOT circuit 7) to the open and close drive signal outputs X and Y. Perform the action of distributing each one.

In this way, in the automatic door opening/closing control device of the present invention, at the same time as the detection signal switches to the opening command (H), the drive signal of the opening drive signal output X switches to the drive command (H), and the first Third timer 3 follows timer 1
This drive command (H) is maintained for the time (T ₁ + T ₃ ) until the end of timing (T 1 + T 3 ), and at the same time the detection signal switches to the close command (L), the drive signal of the open drive signal output Y becomes the drive command. (H), and this drive command (H) can be maintained for a period of time (T ₂ +T ₃ ) until the third timer 3 completes timing after the second timer 2.

Another embodiment of this invention will be described. Figure 3 shows
The first timer 1', the second timer 2', and the third timer 3' are OFF-delay type timers that are time-limited operation instantaneous recovery timers and perform time-limited operation when the input switches to L. Fig. 4 shows the time chart. The logic circuit in Figure 3 is an arrangement in which timers 1, 2, and 3 in the logic circuit in Figure 1 are replaced with off-delay type timers 1', 2', and 3' via NOT circuits for input and output. be. The first timer 1' is
It will be input via the NOT circuit 10, and the NOT via the input of the second timer 2 in FIG.
The circuit 6 and the NOT circuit 7 of the direction selection circuit 4 will be removed due to regression. Further, the signal selection circuit 4 is similar to that shown in FIG.
An OR circuit is transformed into an AND circuit by De Morgan's theorem, with an input/output NOT circuit. Furthermore, in conjunction with the replacement of the NOT circuits 6 and 10, the inputs A and B of the first timer 1' and the second timer 2', which are input to the AND circuits 8 and 9 of the signal selection circuit 4, are respectively replaced. The automatic door opening/closing control device of the present invention configured as described above has the following features:
As shown in FIG. 4, the signals of the inputs A and B of the first timer 1' and the second timer 2' are inverted compared to the case of FIG. 2, but the output F of the third timer 3 is
Therefore, the same signal as the output G of the NOT circuit 7 of the direction selection circuit 5 in FIG. 2 can be obtained, so
The same drive signal as in the case of FIG. 2 can be output.

Figure 5 uses one-shot timers as the first timer 1'' and the second timer 2'', which start time at the same time as the input switches to H, and output a signal that becomes H only while counting time. FIG. 6 shows the time chart. The logic circuit in FIG. 5 has the first timer 1 and the second timer in the logic circuit in FIG.
The timer 2 is replaced with a one-shot type first timer 1'' and a second timer 2'', and the third timer 3 is connected to the signal selection circuit 4 via a NOT circuit 11. As shown in FIG. 6, in the automatic door opening/closing control device of the present invention configured as described above, the first timer 1'' and the second timer 2'' generate a signal that becomes H only during the time period measured. Since the signal is output and input to the signal selection circuit 4 constituted by an OR circuit, the same signal as the output E of the signal selection circuit 4 in FIG. 2 can be obtained at the input E' of the third timer 3. The case is the same as in Figure 2.

As explained above, the automatic door opening/closing control method and the device of the present invention are capable of controlling the opening/closing direction of the door determined by the difference (T ₂ −T ₁ ) between the time measurements of the first timer 2 and the second timer 2. By changing the measured time T 3 of the third timer 3 while keeping _the difference in drive time constant, the door drive time (T ₁ +T ₃ and T ₂ +T ₃ ) can be easily and freely adjusted. Further, since the present invention can be configured with a non-contact logic circuit using CMOSIC or the like, it is possible to improve the performance of the control device, such as improving timer accuracy and reducing failures.

[Brief explanation of drawings]

Fig. 1 is a logic circuit diagram of a first embodiment of the automatic door opening/closing control device of the present invention, Fig. 2 is a time chart of the first embodiment, and Fig. 3 is a logic circuit of the second embodiment. 4 shows a time chart of the second embodiment, FIG. 5 shows a logic circuit diagram of the third embodiment, and FIG. 6 shows a time chart of the third embodiment. 1...First timer, 2...Second timer, 3...
3rd timer, 4...signal selection circuit, 5...direction selection circuit, M...detection signal input, X...open drive signal input, Y...close drive signal input.

Claims (1)

[Scope of Claims] 1. The drive time of the automatic door drive device is measured by one of a first timer and a second timer, each of which is provided at a different time, and by a third timer, which is separately provided. To be able to change the clocking time of this third timer which is set as the driving time in the opening direction and the closing direction by the sum of the time and the driving time in the opening direction and the closing direction, and which measures time in common in both the opening and closing directions. An automatic door opening/closing control method that allows the driving time to be freely adjusted while keeping the difference in driving time in the opening/closing direction constant. 2 Connect in parallel to the detection signal input a first timer that starts timing when the detection signal opens and a second timer that starts timing when the detection signal closes. , a signal selection circuit is connected to take out a signal indicating only while the first and second timers are counting time, and to this signal selection circuit, timing is started when the first timer or second timer finishes counting. , and a third timer that can freely adjust this clock time is connected in series, and the output stage outputs an open drive signal when the detection signal is an open command, and outputs a close drive signal when the detection signal is a close command. An automatic door opening/closing control device which is connected to a direction selection circuit that distributes and outputs drive signals serving as drive commands only during the time period that a first, second, and third timer is counting.